Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 105 for “"gas-solid"”.
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Modelling Non-Catalytic Gas-Solid Reactions
… model for non-catalytic reactions between gases and porous solids, particularly those relevant to the clean use of fossil fuels. Here, the internal pore structure of the solid was characterised by observing the kinetics in a regime limited only by intrinsic chemical reaction. It was …
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High efficiency gas-solid chromatographic columns
A study of two types of high efficiency gas chromatographic columns was conducted. The first type (micropacked) can be defined as columns having an internal diameter less than 1 mm and a particle/column diameter ratio between 0.1 and O.3 and a packing density comparable to conventional packed …
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Evaporating crossflow sprays in gas-solid flows
Injection of evaporating sprays into gas-solid flows is encountered in many engineering processes such as energy production industry and chemical industry. The phenomenon involves phase change, three-phase interactions, heat and mass transfer. All of these characteristics control the process …
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Modeling of Dilute, Swirling Gas-Solid Suspensions
Made available in DSpace on 2014-12-13T19:55:34Z (GMT). No. of bitstreams: 1 8009128.pdf: 5290550 bytes, checksum: 7b59d77cc596cdd0f5f140dcafe5a2f7 (MD5) Previous issue date: 1979
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Turbulent Gas-Solid Electrohydrodynamic Flow Into a Channel
Made available in DSpace on 2014-12-10T22:48:20Z (GMT). No. of bitstreams: 1 7317568.pdf: 5263861 bytes, checksum: 7f85435678598ce7b98bb145f4b59ad7 (MD5) Previous issue date: 1973
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Heterogeneous flow structure and gas-solid transport of riser
… study aims to understand physical mechanisms of gas-solid transport and riser flow, investigate heterogeneous flow structures of gas-solid transport and their formation mechanism of the in riser flows, both in axial and radial directions. It provides sound interpretation for the experimental …
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Gas-solid transport and reaction via intervened evaporating sprays
… to transportation fuels and light olefins. The gas-solid transport with reaction via intervened evaporating sprays in the FCC riser is specially important but complicated, with coupled mechanisms of chemical reaction and heat, momentum and mass transfer among multiple phases (liquid, solid and …
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Scaleup and hydrodynamics study of gas-solid spouted beds
… understanding of the complex flow structure of gas-solid spouted bed is crucial for design, scale-up and performance. Advanced gas-solid optical probes were developed and used to evaluate different hydrodynamic parameters of spouted beds. These optical probes measure solids concentration, …
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Flow of a Gas-Solid Suspension Through a Nozzle
Made available in DSpace on 2014-12-09T17:13:33Z (GMT). No. of bitstreams: 1 6503602.pdf: 3184266 bytes, checksum: 186fc59d38f393470f4238ca03133e88 (MD5) Previous issue date: 1964
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Transport Properties of a Partially Ionized Gas-Solid Suspension
Made available in DSpace on 2014-12-09T17:13:39Z (GMT). No. of bitstreams: 1 6612460.pdf: 2836283 bytes, checksum: 2d383464393675d0c87205c87677b83b (MD5) Previous issue date: 1966
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Gas-solid chromatographic studies of two well-known catalysts
… to explore the scope and feasibility of using a gas chromatograph to study catalytic reactions. Various methods have been proposed in the literature and it was decided to investigate various possible systems. Two catalysts were chosen for study. The dehydration of alcohols over alumina catalysts …
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Interactions Between Supersonic Gas Jets and Gas-Solid Fluidized Beds
… research on the use of attrition nozzles in gas-solid fluidized beds for two applications: green sand reclamation and particle size control in fluid cokers. These two applications make use of the same attrition principles, and the main difference between them is that for green sand …
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Concurrent evaporating spray jets in dilute gas-solid pipe flows
Evaporating spray jets into gas-solids suspensions are encountered in many industrial applications. The rapid evaporation of spray jets has significant effects on the gas-solids mixing near the jet nozzle regions, including non-uniform solids concentration dilution, gas/solids temperature …
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Evaporating cross flow spray jets in gas-solid circulating fluidized bed
Three-phase flow of solid-gas suspension with liquid spray is found in many industrial applications, including fluidized catalytic cracking in petroleum refinery process, and wet scrubbing process. This dissertation study is aimed to understand the gas-solid-liquid three-phase flow structure, phase …
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Intragranular Tungsten-Titanium Carbide Composite Ceramics via Gas-Solid Displacement Reactions
… displacement reactions, conducted through gaseous intermediates, to solid solution systems and serves as proof of concept for the demonstrated reaction process. Application of the studied reaction process to commercial (Ti<sub>0.77</sub>W<sub>0.23</sub>)C powder resulted in the formation of …
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Measurement of properties of gas-solid suspensions using phase-Doppler anemometry
… flow properties of a dense turbulent air-solid suspension in a horizontal pipe was undertaken. The flow properties were measured along vertical and horizontal diameters using Phase Doppler Anemometry which was a nonintrusive technique that measured the size and velocity of particles within …
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Single particle, high temperature, gas-solid reactions in an electrodynamic balance
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1988.
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A Computational Study of the Hydrodynamics of Gas-Solid Fluidized Beds
… dynamics (CFD) modeling was used to predict the gas-solid hydrodynamics of fluidized beds. An Eulerian-Eulerian multi-fluid model and granular kinetic theory were used to simulate fluidization and to capture the complex physics associated therewith. The commercial code ANSYS FLUENT was used to …
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Optical measurement of ash particle size and velocity in gas-solid flow
… velocity distribution of moving particles in a gas-solid environment. The prototype system consists of a digital image acquisition module and MATLAB RTM image-processing module. Two specific applications were conducted. The first is the measurement of ash particle characteristics during surface …
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